This one is a two part design I call The Ultimate Question. This one is featured on t-shirts with the first part on the front and the second on the back. This is a question I've asked myself many times.
Chekhov's Gun refers to the principle in writing that if you show a gun early on, you have to use it in the story by the end. My husband suggested that I use a phaser so it could also pay homage to Star Trek, but I didn't want to come across as confusing (even though not everyone will get this reference anyway). I'll just have to honor Star Trek with something later on.
A play on the phrase "and the meek shall inherit the Earth" with a look to the future tossed in.
And these last two are separate designs but both play around with the arbitrary nature of the way we organize time into units that have so much meaning for us.
Anyway, I hope I didn't bore anyone. If I did, oh well. And if you liked what I had to say with these, keep an eye out for more.